Hi @hippocoupon,
I’m heartily sorry for the inconvenience caused to you.
Can you exactly tell us how the random order number is not working? Do you face the problem with existing orders or with new orders? And did you renumberate the orders[ https://prnt.sc/CC46WVtDhQOM ] for applying random order numbers to existing orders?
I tried at our end and it worked well for me. The existing orders are also changed to the random number after Renumerating them.